(a) 63 cm(b) 62 cm(c) 61 cm(d) none of thes22. The ratio of the circum

1.	(a) 63 cm(b) 62 cm(c) 61 cm(d) none of thes22. The ratio of the circumferences of two circles is 4: 5, then the ratio of theirarea is(a) 16: 25(b) 15 245(c) 20: 25(d) none of thes
Answer» The circumference is directly proportional to the radius of the circle And the area is directly proportional to the square of the radii ∴Ratio of their areas =4²:5²=16:25 Option (a) is correct.

(a) 63 cm(b) 62 cm(c) 61 cm(d) none of thes22. The ratio of the circumferences of two circles is 4: 5, then the ratio of theirarea is(a) 16: 25(b) 15 245(c) 20: 25(d) none of thes

Answer»

The circumference is directly proportional to the radius of the circle

And the area is directly proportional to the square of the radii

∴Ratio of their areas =4²:5²=16:25

Option (a) is correct.